Alert archive / Illinois / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 2, NWS Lincoln, IL

January 22, 20184 counties in Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jan 22, 2018, 1:29 PM CST for 4 counties in Illinois. It was in force for 46 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jan 22, 2018, 1:29 PM CST (19:29 UTC)
Expired: Jan 22, 2018, 2:15 PM CST
In force: 46 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Logan County, IL, Mason County, IL, Menard County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 43 km from the middle of the area, began a volume at 19:32 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jan 22, 1:31 PM CST	HAIL 1	2 Nw Petersburg, IL	HAIL LASTED ABOUT 15 MINUTES...STARTED AS DIME AND NICKEL SIZE...COUPLE OF QUARTER SIZE STONES TOWARD THE END...DELAYED REPORT...TIME ESTIMATED FROM RADAR
Jan 22, 1:35 PM CST	HAIL 0.75	Pleasant Plains, IL
Jan 22, 2:00 PM CST	HAIL 0.75	Petersburg, IL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.5 hours before the alert went out and 104 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 3 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 542 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

557 
WUUS53 KILX 221929
SVRILX
ILC107-125-129-167-222015-
/O.NEW.KILX.SV.W.0002.180122T1929Z-180122T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
129 PM CST MON JAN 22 2018

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Menard County in central Illinois...
  West central Logan County in central Illinois...
  Northwestern Sangamon County in central Illinois...
  Southeastern Mason County in central Illinois...

* Until 215 PM CST

* At 129 PM CST, a severe thunderstorm was located over Petersburg,
  or 15 miles southwest of Mason City, moving northeast at 55 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Lincoln, Mason City, Petersburg, Athens, Pleasant Plains,
  Greenview, Tallula, Middletown, Easton, New Holland, Lincolns New
  Salem and Sweetwater.

This includes the following highways...
 Interstate 155 near mile marker 0.
 Interstate 55 between mile markers 125 and 127.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3984 8993 3992 8998 4030 8980 4017 8938
TIME...MOT...LOC 1929Z 216DEG 49KT 4000 8983 

HAIL...1.00IN
WIND...60MPH
 
$$

07

3 follow-up statements

767 
WWUS53 KILX 221942
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
142 PM CST MON JAN 22 2018

ILC107-125-129-167-222015-
/O.CON.KILX.SV.W.0002.000000T0000Z-180122T2015Z/
Menard-Logan-Sangamon-Mason-
142 PM CST MON JAN 22 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM CST
FOR MENARD...WEST CENTRAL LOGAN...NORTHWESTERN SANGAMON AND
SOUTHEASTERN MASON COUNTIES...

At 142 PM CST, a severe thunderstorm was located near Easton, or near
Mason City, moving north at 50 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Lincoln, Mason City, Petersburg, Athens, Pleasant Plains, Greenview,
Tallula, Middletown, Easton, New Holland, Lincolns New Salem and
Sweetwater.

This includes the following highways...
 Interstate 155 near mile marker 0.
 Interstate 55 between mile markers 125 and 127.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3984 8993 3992 8998 4030 8980 4017 8938
TIME...MOT...LOC 1942Z 196DEG 44KT 4017 8982 

HAIL...1.00IN
WIND...60MPH
 
$$

07

349 
WWUS53 KILX 222003
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
203 PM CST MON JAN 22 2018

ILC107-125-129-167-222015-
/O.CON.KILX.SV.W.0002.000000T0000Z-180122T2015Z/
Menard-Logan-Sangamon-Mason-
203 PM CST MON JAN 22 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM CST
FOR MENARD...WEST CENTRAL LOGAN...NORTHWESTERN SANGAMON AND
SOUTHEASTERN MASON COUNTIES...

At 202 PM CST, a severe thunderstorm was located near Athens, or 12
miles south of Mason City, moving north at 50 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Lincoln, Mason City, Petersburg, Athens, Pleasant Plains, Greenview,
Tallula, Middletown, Easton, New Holland, Lincolns New Salem and
Sweetwater.

This includes the following highways...
 Interstate 155 near mile marker 0.
 Interstate 55 between mile markers 125 and 127.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3984 8993 3992 8998 4030 8980 4017 8938
TIME...MOT...LOC 2002Z 199DEG 38KT 4002 8974 

HAIL...1.00IN
WIND...60MPH
 
$$

07

137 
WWUS53 KILX 222015
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
215 PM CST MON JAN 22 2018

ILC107-125-129-167-222025-
/O.EXP.KILX.SV.W.0002.000000T0000Z-180122T2015Z/
Menard-Logan-Sangamon-Mason-
215 PM CST MON JAN 22 2018

...THE SEVERE THUNDERSTORM WARNING FOR MENARD...WEST CENTRAL LOGAN...
NORTHWESTERN SANGAMON AND SOUTHEASTERN MASON COUNTIES HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

LAT...LON 3984 8993 3992 8998 4030 8980 4017 8938
TIME...MOT...LOC 2015Z 216DEG 49KT 4014 8962 

$$

07

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 22, 1:27 PM CST	Severe Thunderstorm Warning	ILX	Logan, Menard, Morgan, Sangamon	48 min
Jan 22, 1:54 PM CST	Special Weather Statement	ILX	Peoria, Tazewell	51 min
Jan 22, 2:14 PM CST	Special Weather Statement	ILX	Logan, Menard, Tazewell, Woodford	46 min
Jan 22, 2:37 PM CST	Special Weather Statement	ILX	Marshall, Peoria, Tazewell, Woodford	38 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2018 Every severe thunderstorm warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.